Well drill



WELL DRILL Filed Oct. 16, 1924 2 Sheets-Sheet 1 Jig].

' 1,643,730 Sept. 27, 1927- WILD WELL DRILL Patented Sept... 27, 1927.

PATENT OFFICE.

CHARLES WILD, OF EUREKA, CALIFORNIA.

WELL DRILL.

Application filed October 16, 1924. Serial No. 743,989.

This invention relates to well drilling tools and aims to provide adrill of a novel construction including tubing and movable cutting jawsarranged adjacent to the lower end of the tubing, the jaws beingconstructed so that they may be moved to positions beyond the lower endof the tubing to cut a path for the tubing.

Another important object of the invention is to provide a drill of thischaracter which will accomplish the drilling result and at the same timepreserve a core for testing purposes, which core is removed by aspecially designed tool. I

A still further object of the invention is the provision of movablecutting jaws that are automatically moved from their inactive to theiractive positions at the limit of the downstroke of the drill.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction. hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment 0 the invention herein disclosed, may be made with'n thescope of what is claimed, without departing from the spirit of theinvention.

Referring to the drawingszj Figure 1 is an elevational view illustratingthe lower end'of a drill constructed in accordance with the invention,the cutting jaws being shown in their active positlons.

A Figure 2 is a longitudinal sectional view 1 through the drill.

Figure 3 is a bottom plan view thereof. Figure 4 is a sectional viewtaken on line 4-4 of Figure 2,.

Figure 5 is a sectional 5-5 of Figure 2.-

Figure 6 is a sectional view taken on hne 6-6 of Figure 2. 1 Figure 7 isa perspective view of one of view taken on line the! connecting links.

re 8 is a perspective view of'one of- Figu the cutting jaws.

Referring to the drawings in detail, the

reference character 5 indicates the outer casing of the drill inwhichthe drill casing 6 moves.

The reference character 7 indicates the head of the drill casing whichis secured within the casing by means of the bolts 8, the head 7 beingprovided with an opening through which the controlling rod 9 moves.Disposed within the drill casing and as shown, each of these blocks 12is formed with an car 14. apertured to receive the shafts 15 that securethe connecting link 16 to the blocks 12 in a manner to permit the link16 to swing vertically,

The shanks 18 are formed with openings 18 that receive shafts 19 forsecurlng the jaws 19 tothe links 16. At the lower end of the drillcasing 6 is guide member 17 formed with openings through which theshanks 18 of the cutting jaws 19 move, the openings beingarranged atoblique angles so that when-the jaws are moved to their activepositions, the lower ends thereof will extend beyond the outer surfaceof the easing 5 to undercut the lower end of the easing 5 and allow thecasing to move downwardly. j

As illustrated by Figure 2 of the drawings, the rod 9 is formed with athreaded extremity 22 are positioned, the members 21 and 22 being heldin spaced relation with each other to accommodate the heads 23 of thelinks 16, to the end that reciprocating movement of the rod 20 willresult in movement of the connecting links 16 to move the cutting jawsinto and out of their active positions.

A coiled spring indicated at 24 has its lower end engaging the member 21that acts as a seat. for the coiled spring, while the opposite end ofthe coiled spring 24 engages under the partitioning member 10. Thisspring 24: normally acts to urge the members 21 and 22 downwardlytowards the.

20 on which the members 21 andproper has beem released or dropped intothe well being drilled. I

, Formed at the upper end of the rod 9 is an eye 25 to which a' suitablehook may be connected, thehook being of the usual type employed in thedrilling of wells to permit ofa quick and easyapplication of the hook.The device is supported by the usual twisted cable which gives'thedevice a slight rotary movement as it is dro ped to the end that thejaws will be shi ed and will not be to undercut the casing 5 and allowthe casing 5 to feed downwardly into the opening formed. Continuousreciprocation of the jaws results in the cutting or underreaming of thewall to allow the casing 5 to movev downwardly.

It will be obvious that the device cuts into the ground with eachdownward movement of the rod 9, leaving a central core which is removedby an especially constructed tool forming the subjectmatter of aseparate application, the finer particles of stone and earth beingremoved by the well known bailer system.

I claim 1. A drilling tool including blocks secured within the drillcasing and arranged in spaced relation with each other, connecting linkshaving pivotal connection with the blocks and having heads, jaws havingconnection with the links at points intermediate the ends of the links,means .operating through the drill casing and engaging the heads of thelinks to move the jaws so that the cutting surfaces thereof will extendbeyond the end of the drill casing.

. 2. A drilling tool including a drill casing, a rod extending throughthe casing and having adjustable members arranged on the lower endthereof, links having pivotal cona drill casing,

nection with the inner surface of the drill casing and having their freeends disposed between the adjustable members to connect the links to therod, cutting members having pivotal connection with the links andadapted to move at oblique angles with respect to the drill casing tocause the cutting members to be extended beyond the lower end of thedrill casing to cut the ground surface below the drill casing. i

3. A drilling tool including adrill casing, a partitioning member withinthe drill casing, a rod extending through the partitioning member,connectingmembers mounted on the rod, cutting members extending into thedrill casing, means having connection with the upper ends of the cuttingmembers and positioned between the connecting members for moving thecutting members when the rod is moved, and a coiled spring engaging thepartioning member and resting on one of the connecting members fornormally urging the cutting members to their active positions.

4:. A drilling tool including a drill casing, an inner movable drillcasing, a vertically movable rod within the inner casing, a head on therod, jaws within the inner casing, means connected with the inner casingand engaging within the head for connecting the aws and rod, a guidingmember through which the jaws move, said guiding member being carried bythe inner casing, and a coiled spring on the rod for normally urging therod downwardly.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature;

. CHARLES WILD.

